Rock-crusher.



DE WITT G. PRESCOTT.

ROCK GRUSHER. APPLICATION FILED APE.8, 1909.

Patented July 12, 1910.

DE WITT O. PRESCOTT.

BOOK GRUSHBR.

APPLICATION FILED APR.8, 1909.

Patented July 12 1910.

2 SHEETS-*SHEET 2.

' .DE WITT C PBESCOTT, OF CHICAGO, ILLINOIS.

7 Application filed April- 8,1909. Serial No. 488,715.

To all whom it may concern:

Be it known that l, DnWrr'r O. Pnnsoo'r'r, a citizen of the UnitedStates, and resident of Chicago, county of Cook, and State of Illinois,have invented certain new and useful Improvements in Rock- Crushers, ofwhich the following is a specification and which are illustrated in theaccompanying drawings, forming a part thereof. 1 The invention relatesto rock crushers of f the gyratory type; its object being to generallyimprove-devices of this character, and especially to obtain greatstrength with simplicity of action. The invention. is exemplified in thestructure hereinafter described and illustrated in the accompanyingdrawings, in which 1 Figure 1 is a central vertical section of themachine taken on. the plane of the driv-.

'ing shaft; Fig. 2 is a central vertical section on a plane erpendicularto that of Fig. 1; Fig. 3 is a detail section on the line 3-3 of Fig.1'; and Fig. 4 is a-detail section on the line 44 of Fig; 1.

I The machine has an outer shell or casing 10 which provides a baseadapted to be bolted to any suitable foundatlon, .anda

. housing for the mortar .11, the driving I mechanism and the crusherhead. a a vThe mortar 11 is ofthe usual inverted truncated conical form,and has a pluralityofperipheral bearin faces, as 12,13, and '14, whichare paralle with itsaxis and engage similarly disposed bearing facesformed on the inner surface of the shell 10.

The mortar is supportedby a plurality of screw-bolts, as 15, 16, 17, 18,setting upwardly through the wall'of the shell 10 andbearing againstashoulder 19 on the mortar. vThis arrangement permits. of verticaladjustment of the mortar to regulatethe size of the output of the mill.

The crusher head 20 takes the form of a 1 truncated cone, and is carried.by'a hollow spindle,,21. This'spindle fits within an cecentric socketin an internal gear 22 which is journaled within-'abox 23 formedintegral with an instandin I of theshell 10. T e gear 22'has aperipheral flange 25 which rests upon the upper end of the box 23 andsupports the weight of the crusher head. a I

, An internal gear 26, having an eccentric socket which receives theupper end of the 68 spindle 21, is journaledin a the shell 10. The gear26 has at its upper horizontal partition 24 ead 27, carried by a spiderwhose arms are designated 28, 29 and 30, and rise from the walls of ahopper 31 which is seated upon the'top of end a radial flange 32, whichbears upon the head 27.

A shaft 33 is journaled upon the axis of the shell, its lower end beingfitted within a socket lblock 34 resting upon the base of" the shell 10,and the weight of the shaft being supported by one or more wearing disks35 at the bottom of the socket of the block. The upper end of the shaft33 is ournaled in a box 36 formed in a ca 37 restmg u on and secured tothe hea 27. A pair 0 spur gears 38, 39, are fixed upon the shaft 33,cooperating, respectively, with .theinternal gears 22 and 26. A bevelgear 40, fixed upon the shaft 33 adjacent its lower end, meshes with abevel ear'41 on a drivlng shaft 42 carrying a It pulley 43, by means-ofwhich'power may be transmitted to the mill. The pulle 43 is secured tothe shaft 42 by means 0 frangible bolts 44, v as 1s usual in this typeof machines, thereby providing against serious accidents in case of 010gmg of the mill.

A dust s ield. 45 is secured to the upper end of the, spindle 21 toprotect the upper gears, and a dust shield46 is secured to the ang'e 25.of the gear 22 and overhangs the box 23. A chute 47 carries. the crushedrock from the mill. The hopper 33 and its appurtenances are secured inplace b means of bolts, as 48, 49, setting throughl ugs 50, 51, on thehopper and a flange 52 ad acent the upper end of 'theshell 10.

The rotation of the shaft 33 turns the gears 22, 26, thereby causingthespindle 21 and crusher head 20 to travel in a circular .orbit about theshaft as acenter. The spindle is free to turn within the sockets of thegears, and under the influence of work the head will be caused to rotateas it revolves. 8

I claim. as my invention- 1. In 'a rock crusher, in combination, a

'.shell, a mortar within theshell, a driving shaft on the axis of themortar, a pair of internal "gears loosely encircling the shaft, oneabove and the other below the mortar, such gears having eccentricsockets in their contiguous faces, a hollow spindle having .its endsseated in the eccentric sockets, a

conical crusher head mounted on the spindie, a pair of spur gears finedon the shaft and meshing with the internal gears, and means for drivingthe shaft 2. In a rock crusher, combination, a shaft, an internal gearloosely encircling the shaft and having an eccentric socket, a spindleseated in the socket and carrying a crusher head, a spur gear fixed onthe shaft and engaging the internal gear, andmeans for driving theshaft,

3. In a rock crusher, in combination, a shaft, an internal gear looselyencircling the shaft, a spindle having an eccentric bear ing on. thegear, a crusher heaii mcunted. on the spindle, a spur gear fined 0n theshaft and engaging the internal gear, and means for driving the shaft4:. In a rock crusher, in combination, a. shell having a hearing cellarconcentric with its axis, an internal, gear jcnrnaled Within the hearingand having aiia-nge resting on scarce its upper end and an eccentricsocket, a

head Incnnted on the shell and having an annular hearing concentric withthe axis thereof, an internal gear journaleii in such hearing-and;having a flange resting on its upper end and havinggan eccentric socket,a shaft on the axis of the shell and ste ped earing carried by the heasuch shaft extending le cseiy through the two internal gears,

a pair of sfiur gears fixed in the shaft anct engaging; t

e two internal gears, a. spin tile fitting withm the eccentric socketsof the internal cars, a crusher head mounted on the spindle, a mortarinclosing the crusher head, and. means for driving the shaft,

. DE WITT C. PRESCOTT. Witnesses: e

L, K0 Gwen, F, A: Gama

